What is the typical range for pneumatic analog signal representation by transmitters?

The typical range for pneumatic analog signal representation by transmitters is commonly set at 20 – 100 kPa. This range corresponds to the standard 3 to 15 psi signal used in many industrial applications, where 0 kPa represents the low end and 100 kPa represents the high end of the signal.

Transmitters convert the measured variable (like pressure, temperature, or flow) into a pneumatic signal which operates valves and other control devices in a process. The 20 – 100 kPa range is designed to accommodate most control systems effectively. This ensures that the signals are robust enough to overcome losses due to friction and other factors in the transmission lines, as well as maintain a clear and reliable indication of the measurement being sent.

Understanding this standard range is critical for anyone working with process control systems as it allows for effective communication between various elements of the control system.